A bit complicated for my small brain, but an excellent unit overall My old Sony MEX-BT2800 stopped working after over 5 years daily use, It cost me about £100 then so I thought I’d spend roughly the same amount again.Pros:• easy to fit, supplied with DIN cables, plugged straight into the standard connections of my 1999 Mercedes E-Class, which are standard DIN• plugged straight into my sub-woofer via phono connections, you can set the hi-pass and low-pass levels on the head unit• connected to my Windows Nokia Lumia…